update ru translation
update ru translation

Change-Id: Iafda1bef8d5eedb57e5dc1efe5d27364424b5692
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/213729
Tested-by: Jenkins

sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms